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<TITLE>JavaScript Source Code 3000:  Calculators:  Graphing Function</TITLE>
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<META NAME="description" CONTENT="Enter the X-Y coordinates for a function and this script will give you the graphing formulas, including Formula, Slope, Y-intercept, Parallel and Perpendicular lines.  Easy!">
<META NAME="date" CONTENT="2000-11-22">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="Abraham I.">
<META NAME="section" CONTENT="Calculators">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Abraham I. (abraham_824@hotmail.com) -->




<!-- Begin
function calculate() {
var y = new Array();
y[0] = null;
y[1] = document.calculator.y1.value;
y[2] = document.calculator.y2.value;
var x = new Array();
x[0] = null;
x[1] = document.calculator.x1.value;
x[2] = document.calculator.x2.value;
var m = (y[2] - y[1]) / (x[2] - x[1]);
var b = y[1]-(m * x[1]);
var formula = "y="+m+"x + "+b;
var rand = parseInt(Math.random() * 7);
var parf = "y="+m+"x + "+rand;
var newm = m / -1;
var perf = "y="+newm+"x + "+b;
document.calculator.formula.value = formula;
document.calculator.slope.value = m;
document.calculator.yint.value = b;
document.calculator.parf.value = parf;
document.calculator.perf.value = perf;
}
//  End -->
</script>

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<A HREF="index.htm" /calculators/"><font color="#FF0000"><b>Calculators</b></font></A>
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<FONT COLOR="#006666"><b>Graphing Function</b></font></font>
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<!-- Description --><!--content_start-->
Enter the X-Y coordinates for a function and this script will give you the graphing formulas, including Formula, Slope, Y-intercept, Parallel and Perpendicular lines.  Easy!
<hr>
</td></tr>
</table>
<!-- Demonstration -->
<form name="calculator">
Enter coordinate values:
<table border=0>
<tr>
<td>X1:</td>
<td><input type=text name=x1 size=10></td>
</tr>
<tr>
<td>Y1:</td>
<td><input type=text name=y1 size=10></td>
</tr>
<tr>
<td>X2:</td>
<td><input type=text name=x2 size=10></td>
</tr>
<tr>
<td>Y2:</td>
<td><input type=text name=y2 size=10>
<input type=button value="Get Results" onClick="calculate();"></td>
</tr>
<tr>
<td>Formula:</td>
<td><input type=text name=formula size=50></td>
</tr>
<tr>
<td>Slope:</td>
<td><input type=text name=slope size=50></td>
</tr>
<tr>
<td>Y-Intercept:</td>
<td><input type=text name=yint size=50></td>
</tr>
<tr>
<td>Parallel Line Formula:</td>
<td><input type=text name=parf size=50></td>
</tr>
<tr>
<td>Perpendicular Line Formula:</td>
<td><input type=text name=perf size=50></td>
</tr>
</table>
</form>
<P>
<P>
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<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  Calculators:  Graphing Function</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s).  The script is yours!!!
<br><br></font></td></tr>
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<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  2.60 KB" size=24>
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- TWO STEPS TO INSTALL GRAPHING FUNCTION:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  --&gt;

&lt;!-- STEP ONE: Paste this code into the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;
&lt;!-- Original:  Abraham I. (abraham_824@hotmail.com) --&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
function calculate() {
var y = new Array();
y[0] = null;
y[1] = document.calculator.y1.value;
y[2] = document.calculator.y2.value;
var x = new Array();
x[0] = null;
x[1] = document.calculator.x1.value;
x[2] = document.calculator.x2.value;
var m = (y[2] - y[1]) / (x[2] - x[1]);
var b = y[1]-(m * x[1]);
var formula = "y="+m+"x + "+b;
var rand = parseInt(Math.random() * 7);
var parf = "y="+m+"x + "+rand;
var newm = m / -1;
var perf = "y="+newm+"x + "+b;
document.calculator.formula.value = formula;
document.calculator.slope.value = m;
document.calculator.yint.value = b;
document.calculator.parf.value = parf;
document.calculator.perf.value = perf;
}
//  End --&gt;
&lt;/script&gt;

&lt;/HEAD&gt;

&lt;!-- STEP TWO: Copy this code into the BODY of your HTML document  --&gt;

&lt;BODY&gt;

&lt;form name="calculator"&gt;
Enter coordinate values:
&lt;table border=0&gt;
&lt;tr&gt;
&lt;td&gt;X1:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=x1 size=10&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Y1:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=y1 size=10&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;X2:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=x2 size=10&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Y2:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=y2 size=10&gt;
&lt;input type=button value="Get Results" onClick="calculate();"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Formula:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=formula size=50&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Slope:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=slope size=50&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Y-Intercept:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=yint size=50&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Parallel Line Formula:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=parf size=50&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Perpendicular Line Formula:&lt;/td&gt;
&lt;td&gt;&lt;input type=text name=perf size=50&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/form&gt;

 

&lt;!-- Script Size:  2.60 KB --&gt;</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

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